What’s the most embarrassing moment you’ve had since you started learning/speaking?

Used to work at a ramen store when I was only in my 3rd semester. When I tried to compliment a female coworker on her red lipstick I accidentally said "ちくびる" instead of "くちびる". I think she missed the ru there and just stood there flabbergasted. When I realized it myself I just wanted to die on the spot, because I wasnt really close to her or anything.

But yea… so tell me about yours. I cant be the only one to fuck up this bad.