An attempt of a moustache grown by a Birko that just has no strength in it whatsoever, usually just wisps of pubic hair grown above the top lip and a far cry from that of Magnum (Tom Selleck)
" I went on a bender and woke up three days later with what looked like a Birkenhead Mouser, I instantly shaved it off before leaving the house "
by John Gaskell September 17, 2005
Sexual act ; The Man (Mouser) allows another man to pull out his pubes wearing them as whiskers. He then sprawls on all fours and begins to deficate on the other man.
by dmsgopise February 19, 2008
someone who works REALLY hard and deserves a break because they deal with shit during the school year, as well as the summer, and even with everything that is going on, STILL manages 2 kick major ass in everything she does because she is just that FUCKING MARVELOUS! =)
by mighty-mouser September 1, 2006
by YAOI MAN February 8, 2022