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1 definition by w3b5ter

a. Any trip involving two or more men performing manly feats with no planned route or attainable destination

b. Any trip that deviates from the original plans and leaves the women-folk behind
"Dude that was the greatest manventure ever!" (In the context of drinking all night and smoking cigars on the streets of center city Philadelphia)
by w3b5ter July 22, 2011