The 10th track on The Who’s 1973 rock opera Quadrophenia, and the last track on the first disc. Written by guitarist/vocalist Pete Townshend, “I’ve Had Enough” depicts Jimmy, the protagonist of the rock opera, giving up on the idea of fitting in with the Mods or anyone else in society, and instead opting to retreat from the world into himself. The cause of this is a series of incidents that pile on his mind until the final straw: when Jimmy sees the girl he loves with his best friend instead of himself.

Townshend had a bit more to say about the song here:

A lot happens around this bit, much of it in the album cover story. Briefly, Jimmy ‘snaps’ when he sees a girl he particularly likes with a friend of his. In a desperately self-pitiful state, he smashes up his prize scooter and decides to go to Brighton where he had such a good time with his friends chasing Rockers and eating fish and chips.