People often have a hard time thinking up the words to use on someone they have a crush on. You should make her feel special, lucky, and then some more says menwit.com, in an article entitled; nice things to say to a girl.’
According to Art of Charm before saying anything, remember to keep it light.
However, a lot of people are clearly not following these useful tips. A report on refinery29.com compiles a list of cringe-worthy pick-up lines that they had their readers submit online and some of these pickup lines are just unbelievable.Hopefully, they would serve some sort of future guide on what not to say to a crush.

• “Once a guy said he wrote a poem from me from across the bar. Later, when I read it, it was a sexually explicit Madonna song.” - Lisa Stardust

• "I was 16 working in retail during Christmas season: 'Let me decorate your Christmas tree.' He was totally wasted. When he found out I was underage, he thought it was still okay because I was 'so tall.'" –Becca

• "Daaaayyyyummmgurl, you look mean as hell!"

• "You are the spitting image of my 12-year-old daughter."

• "Wow, you are Big Bird!' said by a guy who was 5'2. I'm 5'9 and plus-size. I wanted to step on him, but decided to fly away." - Jeanne Prisyazhnaya.

• "'You look like you taste good.' BARF BARFBARF." - Rachel Charlene Lewis.

• "'Do you drink coffee in the morning?' Me: No. 'I have orange juice, want to try that?'" - Lydia R.

• "Do you come in a green bottle?... Because I'd sure like to mount 'n' do you." 

• “'What breed is your dog?' Followed by 'What breed are you?'” - Jennifer Hassan.

• "Once without any greeting or preamble I received [on a dating app], 'I would burn all the chairs in the world so you'd have to sit on my face.'" - Emily Jones.

• "'Do you wear Hello Kitty pajamas?' - from a straight guy on OkCupid with no profile pic."

• "Ugh, one time someone literally asked me with no lead-up, 'So, want to have a quickie in the bathroom?' We were on a bus from Boston to NYC." — Beth Parker.

• "From an Uber driver: 'You wanna come back to my place and have some soup?'" - Robert Kuang.

• "On Tinder, some guy’s first message was, 'Wanna go halfsies on a baby?'" - Tyler Vendetti.

• "Years ago in Sicily, a local guy told me winsomely/hesitantly that I looked like a wardrobe. I was taller than him if it helps".

• "Guy: do you like games?
  Me: uh...sure
  Guy: OK. Let’s play house: you be the door, and I’ll slam you.
  This was at least 5 years ago and I still can’t forget." - Marina Carlson

• “Once a guy said he wrote a poem from me from across the bar. Later, when I read it, it was a sexually explicit Madonna song.” - Lisa Stardust

A lot more of these terrible pickup lines could be found here.