[jillybean]

Yes Twerb , not with a P.
Is this the same as what is known here as suction?

Is it Brown sticker?


Typical TWERB Structure
While variations exist, a common implementation over a 1NT opening follows a "next suit or the other two" pattern:
2♣: Shows Diamonds OR Hearts + Spades.
2♦: Shows Hearts OR Spades + Clubs.
2♥: Shows Spades OR Clubs + Diamonds.
2♠: Shows Clubs OR Diamonds + Hearts.

[awm]

The following are categorised as Brown Sticker:

1. Any opening bid of two clubs through three spades that could be made on 9 high card points or less, and does not promise at least four cards in a known suit.
2. An overcall that does not promise at least four cards in a known suit, over a natural opening bid of one of a suit.
3. Any "weak" two-suited overcalls at the two or three level that may by agreement be made with three cards or fewer in one of the suits.

There are some exceptions to these rules as well.

However, it would seem that no defence to a 1NT opening is brown sticker (except possibly via #3 above, if for example 2♣ could be "hearts + spades" with a 4324 distribution).

[mw64ahw]

Two way exclusion relay bids

A new one on me TWERB

Sounds like 2 applies if playing the version above with no known 4-card suit

[mycroft]

...as awm says, "over natural one of a suit" opening.

So, not Brown Sticker over Precision Club (as one pair plays against me)(*). Not B-S as a defence to 1NT.

Note, there are those who believe the other term for the system has a silent "K". (My problem with it is that very frequently, less so now than back in the day when it was Mid-Chart, the bidder has "the third option" - i.e. "I forgot, this is the suit I have". Which, oddly enough, would make it a harder system to defend against if overcaller's partner would actually believe them).

(*) Surprisingly, they want to play this over 1♣, and over 1♣-1♦, but not over 1♣-1♥ "any 8-11" or over 1♦ "usually a weak NT, but either minor could be our long suit". Not sure I understand, but I'm okay with it as the opponent :-).