'burn up' definitions:

Definition of 'burn up'

From: WordNet
verb
Burn brightly; "Every star seemed to flare with new intensity" [syn: flare, flame up, blaze up, burn up]
verb
Use up (energy); "burn off calories through vigorous exercise" [syn: burn off, burn, burn up]
verb
Burn completely; be consumed or destroyed by fire; "The hut burned down"; "The mountain of paper went up in flames" [syn: burn down, burn up, go up]