def is_phrase_a_substring_in_list(phrase, check_list):
    """

    :param phrase: string to check if Substring
    :param check_list: list of strings to check against
    :return: True if phrase is a substring of any in check_list, otherwise false

    >>> x = ["apples", "bananas", "coconuts"]
    >>> is_phrase_a_substring_in_list("app", x)
    True

    >>> is_phrase_a_substring_in_list("blue", x)
    False
    """
    return any(phrase in x for x in check_list)