Top Definition
it's a feeling that you get after sniffing amphetamine(a central nervous system stimulant that increases energy) and smoking weed about 20 minutes afterwards. It is important that you do not smoke weed right after sniffing speed because you kill your high. It was created on drum and bass parties in Poland where speed and bass is very popular.
Wadim : I don't smoke weed at all I only do amphetamine.
Maciek : I like smoking green when I'm high on speed because it gives me this extra bass.
by Maciej June 15, 2006
6 Words related to Xtra Bass

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