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1.
A male person who tries desperately hard to pick up women but never succeeds. A slombat is seen constantly talking to women, flirting with women and attempting to seduce women but is always left empty handed.
Did you see how hard that guy was trying to pick up ash- what a slombat

The slombat is on the prowl, but he failed again
by Small c May 17, 2011
 
2.
The first ever down syndrome Pokemon character, slombat spends his time slomming around, making friends and chomping the yellow.
Hey check it out, a Slombat, gross!
by SlombatHunter August 10, 2008