Five second rule 

The rule that states if a guy is in and out of a girl's vagina (and finishes) while having sex in five seconds or less, it doesn't count toward his body count.

These girls should call me the delivery guy with how often I enforce the five second rule.

Five second rule by rectalreloader September 7, 2018

five second rule of texting 

The rule stating a DOUBLE TEXT is ok AS LONG AS the second text message is sent within 5 seconds of the first.

I double texted Shelly, but it was ok cuz I used the Five Second Rule of Texting.

five second rule of texting by Piledriver10000 February 29, 2016

five seconds rule of the public toilet 

A rule apply for taking a shat in public toilet, stating that after you saw someone exited a public toilet, you can't enter and seat within 5 seconds, otherwise you will still feel the creepy warmth as if you are placing your ass upon another unidentified, disgusting ass that just pooped

Pete: Oh man I was about to shit my pants so I ignored the five seconds rule of the public toilet
Pete's boyfriend: We are not going to do anal for 5 months because of that

five seconds rule of the public toilet by cinamon_muff August 12, 2016