A fork of Rural Dictionary
Being weak in the knees means whenever you see something attractive or after you have sex and/or cum your legs feel weak
Hey do you see that hot girl over there?! Yeah look at her fat ass Man she’s got me weak in the knees
What one says/feels after they had amazing sex and/or a splendid fap session, the feeling is so intense you can barely stand up, thus weak in the knees.
Guy "Dude, you all right? your legs are wobbling" Dude "Yeah I'm all right, I just received the best blow job from my gf; made me weak in knees " "Damn, I jizzed so hard last night my legs couldn't support me for the next 3 minutes." "Damn, I banged my gf so hard last night I thought my knee caps would explode" weak in the knees
You and your partner engage in intense rough sexual intercourse stood up (preferably over a kitchen table) once the woman begins to climax her legs will shake, tap the back of her legs to make her fall over, can be used as an embaressment technique
Mark: I got gertrude back by giving her the weak knees