Butt-out

to strike or push with the head or horns.
to strike or push something or at something with the head or horns.
to project.
Machinery. (of wheels in a gear train) to strike one another instead of meshing.
a push or blow with the head or horns.
butt in, to meddle in the affairs or intrude in the conversation of others; interfere:
It was none of his concern, so he didn’t butt in.
butt out, to stop meddling in the affairs or intruding in the conversation of others:
Nobody asked her opinion, so she butted out.
noun
the thicker or blunt end of something, such as the end of the stock of a rifle
the unused end of something, esp of a cigarette; stub
(tanning) the portion of a hide covering the lower backside of the animal
(US & Canadian, informal) the buttocks
(US) a slang word for cigarette
(building trades) short for butt joint, butt hinge
noun
a person or thing that is the target of ridicule, wit, etc
(shooting, archery)

a mound of earth behind the target on a target range that stops bullets or wide shots
the target itself
(pl) the target range

a low barrier, usually of sods or peat, behind which sportsmen shoot game birds, esp grouse
(archaic) goal; aim
verb
usually foll by on or against. to lie or be placed end on to; abut: to butt a beam against a wall
verb
to strike or push (something) with the head or horns
(intransitive) to project; jut
(intransitive; foll by in or into) to intrude, esp into a conversation; interfere; meddle
(informal, mainly US & Canadian) butt out, to stop interfering or meddling
noun
a blow with the head or horns
noun
a large cask, esp one with a capacity of two hogsheads, for storing wine or beer
a US unit of liquid measure equal to 126 US gallons
noun
Dame Clara. 1872–1936, English contralto
n.
v.

The buttocks; rump; ass •This sense is attested as western US in 1860. Oddly enough, butt looks like a diminutive of buttock, but to judge by the suffix, the opposite must be the case.: So drunk he couldn’t find his butt with both hands (1450+)
The remainder of a smoked cigarette or cigar (1930s+)
A cigarette: a pack of butts (1900+)
The final year of a prison sentence or a term of military enlistment (1915+ Armed forces & prison)
Something or someone disliked •Somewhat derogatory: woman is a real butt