The phrase "all hetero" is synonymous with examples of the literary devices of modifiers. The phrase strictly clarifies & classifies a statement as heterosexual (not gay), that potentially could have been viewed as heterosexual or homosexual. This is differentiated from no homo
or no bruno
, in that these two phrases are used to clarify the heterosexual intent of an otherwise homosexual statement. However, the phrase "all hetero" can be used in a "no homo statement," but not vice versa (as a "all hetero statement" may not have been homosexual in the first place).
"The wind blew me today; all hetero." The wind could be personified as either male or female, thus "all hetero" is used.
Not an Example:
"Suck my dick," when said male to male, should include no homo
as opposed to "all hetero."