guy: hey, can you tell i have a raging hard on right now?  girl: what the fuck?  guy: yeah, just did a little 12-o-clock tuck
when you need to hide an erection and you tuck it straight up into your waistband/beltline
"guy: hey, can you tell i have a raging hard on right now?  girl: what the fuck?  guy: yeah, just did a little 12-o-clock tuck" What is the definition of "12-o-clock tuck"?