Russian individual, often military personnel, fighting in a conflict zone of the former USSR. Contraction of the phrase их там нет (they aren’t there) used by Russian officials to deny any involvement. Alternative form: ихтамнету.
Благо, традиция ихтамнетов, устоявшаяся и обкатанная неоднократно.
Fortunately the “ain’t-noone-there” tradition is well-established and tried and tested repeatedly.
(Сталингулаг @ telegram, 04/2020)