shaky legs
When a female receives oral sex so stimulating it causes legs to shake thus having "shaky legs".
He ate me so good he gave me shaky legs!
Shaky leg
When a person has had too much molly or one too many disco biscuits which causes their legs to shake vigorously for an extended period of time.
Shouldn't of had that last pill. Got proper bad shaky leg, they are shaking like a shitting dog!