It may simply indicate the user was born in 1988 . Summary of Risk
While the "88" suffix is heavily associated with hate speech, it can occasionally have non-political meanings: kolgotovborya-88
A common diminutive of the Russian masculine name Boris. It may simply indicate the user was born in 1988
Historically used by operators to mean "love and kisses". kolgotovborya-88
Due to the presence of the number "88," particularly in a username that appears intentionally obscure or subcultural, there is a high probability that this identifier is intended to signal specific within the Russian-speaking web. 14/88 - Википедия
Refers to "tights" or "pantyhose."