Mustard has a sharp or keen taste. "Keen as mustard" means being sharp-minded.
As keen as mustard or as keen as a kitten
Food
"Keen" can mean either sharp or eager.
Mean Mr. Mustard was created on 1969-09-26.
The word "keen" rhymes with mean and can also mean to scream loudly or shout enthusiastically.
sheen, lean, mean, bean, green, jean, keen, ween
blob
mustard gas
"The chase is keen." It often referrs to any sort of chase, that is in your favor. Or "keen" can be used such as; "Hello, Sheryl. I'm not to keen on our dinner plans, can we reschedule?"
Keen, Mean, Gleen
keen sight
very keen