Natural Suit Bid
A Natural Suit Bid is the opposite of a Cue Bid.
For example, after (1)-1-(1), the bid of 2 is natural, not a cue bid. To cue bid, you would bid RHO's suit (Hearts) because while 1 may be opened with as few as 3 Clubs, the 1 free bid normally shows at least 5 Hearts.
A Natural Suit Bid normally shows a good 6-card suit.