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1.
a word used when something is good
when some one goes to a rave and a song they like comes on the crowd screams "BLUP BLUP"
by ticks February 14, 2005
 
2.
The sound you make when you shoot fireballs as Fire Mario during Super Mario Brothers for the NES
Mario raced towards the end of world 1-1 and some Goombas ran up on him, fortunately he snagged the Fire flower earlier in the level and took them out with a blup blup
by MrSteve1337 September 09, 2009