When a male inserts his penis into a Taco Bell Beef Burrito while erect so that another individual can eat the burrito while performing fellatio.
It is a common courtesy in many north american schools to feed the sloot that is gobbling your knob so this kills two birds with one stone.
-Bro I heard you got a Riles Beej from that sloot on Arthur.
-Hell yea man, ten times better than a slowblow
-Honestly I was so happy he let me give him a riles beej yesterday, that beef burrito really hit the spot.