When I looked it up in my 3 go to resources, Jisho, Weblio and Eijirou, the
first two completely struck out, and Eijirou only shows it as part of これ見よがし.
Just how does one use this term?
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2017-11-08T00:22:45.573
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question
words
What grammatical function does 見よがし have?
They don’t have the word? Anyhow, これ見よがし implies show-off. Such as “iphoneX
をこれ見よがしに見せ付ける。” _He ostentatiously shows iphoneX to everyone_
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2017-11-08T00:43:51.143
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Seriously, Jisho is so useless; It does not even have 「がし」.

In Classical Japanese, 「がし」 was pronounced and spelt 「かし」 and it was a
sentence-ending particle used for **_calling someone's attention, reminding
someone of something_** , etc. It is, however, no longer used as a sentence-
ending particle.

Instead, 「がし」 is used today as a suffix to the **imperative** form of a verb
meaning " ** _as if to say/require/order ~~_** ". It carries a bit of a
literary flavor (which quite a few people are partial to). In reality, it is
used mostly in a limited number of set phrases such as:

「これ見よがし」= "as if to order you to take a look" ➡ "in a show-offish manner"

「出{で}ていけがしの態度{たいど}」 = "an attiude as if to order you to leave"
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