This phrase is another way of saying, "to have sex."

Also, "to fornicate in a grassy field."

To roll in the clover implies that a man and his smitten lover have been having intercourse in a field of some sort.

Sometimes, this can be equated to recieving field head.

Some people insist that this is what happened in a deleted scene in a star wars movie.
Jack: I sure am bored.
Jill: What do you want to do?
Jack: You know i just want to roll in the clover with you.
Jill: There's a nursery rhyme we won't publish...
by g-diggity April 3, 2008
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