overreach

Short definition from Wiktionary

Verb

1. 1
   To reach above or beyond, especially to an excessive degree.
2. 2
   To reach above or beyond, especially to an excessive degree: To defeat or override a person's interest in property; (British, specifically) of a holder of the legal title of real property: by mortgaging or selling the legal title to a third party, to cause another person's equitable right in the property to be dissolved and to be replaced by an equitable right in the money received from the third
3. 3
   To do something beyond an appropriate limit, or beyond one's ability; to overextend.
4. 4
   Of a horse: to strike the heel of a forefoot with the toe of a hindfoot.
5. 5
   To deceive, to swindle.
6. 6
   To sail on one tack farther than is necessary.
7. 7
   To get the better of, especially by artifice or cunning; to outwit.

Noun

1. 1
   An act of extending or reaching over, especially if too far or too much; overextension.
2. 2
   Of a horse: an act of striking the heel of a forefoot with the toe of a hindfoot; an injury caused by this action.