noun
open tanyao; tanyao with open melds
Mahjong term for a tanyao (all simples) hand that includes open melds (calls). Allowed in many but not all rule sets; often explicitly permitted or prohibited in game settings.
See also: タンヤオ
このルールでは喰いタンありですか？
Is open tanyao allowed in these rules?
喰いタンで上がるには、鳴いてもいい。
To win with open tanyao, you can call tiles.
タンヤオ is the general term for a tanyao hand (all simples), which can be either closed or open. 喰いタン specifically refers to the open variant, often subject to rule restrictions.
Compound of 喰い (kui, 'eating', referring to open melds/calls) and タン (tan), an abbreviation of タンヤオ (tanyao, 'all simples'). The term distinguishes the open version of the tanyao hand.