my teacher asked me to stand up in class, i had a huge boner so i needed to flip up quickly before i stood
to have an erection and attempt to disguise it by flipping your penis upwards -- so it is held between you underwear/pants and you waistline
"my teacher asked me to stand up in class, i had a huge boner so i needed to flip up quickly before i stood" What is the definition of "flip up"?