"Everybody's got to believe in something. I believe I'll have another beer."
-W.C.Fields
I've occasionally had a beer like that. Apparently some people can perceive Summit hops as tasting of garlic, so it's not necessarily the brewer's intention, nor a brewing fault, nor a result of bad cellarmanship (despite it getting a mention in this piece on off flavours in beer). But Shepherd Neame Maverick is brewed with Centennial and dry hopped with Jester, Olicana and Ernest, so not sure what was going on there. Here's some more reading for you, if you're interested.
Come On You Hatters!
Interesting reading. Whatever the hop, Shepherd Neame Tom Cat would be a better name.