Word: straightsplain
Part of speech: Verb
Syllables: straight
splain
Definition: To explain LGBT issues, people or behavior to someone who is not of a heterosexual orientation (i.e. an LGBT individual) in a condescending manner, presuming the listener's inferior understanding.
Morphemes:
Affix: straight
Language: en
PoS: Noun
Meaning: A heterosexual; a heterosexual person; someone having a sexual orientation to persons of the opposite sex
Affix: -splain
Language: en
PoS: Suffix
Meaning: A suffix combined with a descriptive adjective or noun to create a verb meaning someone who fits that description condescendingly explaining something to someone who does not fit that description (especially, something the listener has more experience of).