The phrase "fawned up on" may be confusing for some due to its uncommon use. The correct spelling of the phrase is /fɔːnd ʌp ɒn/. The word "fawned" is the past tense of "fawn" which means to show excessive admiration or affection. Meanwhile, the preposition "up on" means to approach, encounter or meet. Therefore, "fawned up on" means to excessively show admiration upon meeting someone or something.