One possible interpretation of this phrase is that it's a tongue-in-cheek commentary on the art of salad-tossing. Perhaps the speaker is suggesting that their mom has mastered the technique of tossing salads to an exceptional degree, elevating it to a "lethal" or impressive level. The numbers "21" and "20" could represent scores or ratings, implying that the salad-tossing skills have been quantified and deemed exceptional.

The phrase "your mom tossed my salad" is a playful and innocuous expression that could be interpreted in various ways. However, when accompanied by the descriptors "21 lethal hardcore 20 extra quality," it takes on a rather surreal and humorous tone.

In conclusion, while the topic "your mom tossed my salad 21 lethal hardcore 20 extra quality" may seem bizarre or perplexing at first glance, it can be seen as a reflection of our innate desire for creative expression and playfulness. Whether interpreted as a joke, a commentary on salad-tossing skills, or simply a collection of absurd words, this phrase is sure to spark a smile and inspire further exploration of the complexities of language.

Another possible reading is that the phrase is simply a playful jab or a nonsensical statement meant to elicit a reaction. In this case, the descriptors "lethal hardcore" and "extra quality" serve to amplify the absurdity and whimsy of the initial statement.