The noise a cat makes when it greets you. The cat doesn't open its mouth, as in a meow. It's almost like a purr/grunt sound.

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

A plurp is a penis fart (like a quief is a vagina fart). A plurp is less common, however.

the noise bird poo makes when it lands

to eat soup with a plunger

An abject, almost violent-yet small-fart. Out of nowhere kind of fart.

to tummy flash someone