Р316
РУКИ КОРОТКИ (КОРОТКИ) (у кого)
collVP subj. with быть0 (pres only), оказаться (past only)often used with the
infin of another verb
fixed WO s.o. does not have the right, authority, or influence to do sth. (used-often as a response in a dialogue-to state that the person or organization threatening to harm the speaker or another person will not be able to carry out the threat): (y X-a) руки коротки (сделать Y) - X's reach is (too) short
X's arm isn't long enoughX doesn't have the power (X is powerless) (to do Y)(in limited contexts) (just) let X try (to do Y)
(when used in direct address) руки (у тебя (у вас)) коротки! = just try it!
just you try!