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1.
When a woman gives a man a blowjob, but right before the man reaches orgasm, he pulls his penis out, sticks the head of the penis into the woman's nostril, then jizzes into her nose.
With a runny, instead of spit or swallow, it's slurp or snot.
by $l-l@l\l3 June 28, 2012
4 2
 
2.
This word can be used when someone says something that's meant to be funny, but actually it's shit.
That joke was well runny, mate.
by fo-sho July 23, 2005
4 14
 
3.
opposite of sunny
look outside is very runny
by Dddd Dave August 12, 2003
4 22